Superior Diesel Performance is your one stop shop for all your diesel performance needs.  We sell high quality high performance parts for your Cummins, Duramax or Powerstroke.  Whether  you're looking for horsepower,  or just a little better fuel economy, we've got the solutions!

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1-888-730-3988

YOUR #1 SOURCE FOR H&S TUNERS

Exclusive to H&S Performance, the Mini Maxx offers the flexibility of shift-on-the-fly tuning, as well as giving you the ability to monitor vital engine statistics at a glance. 

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The XRT Pro is the solution that can meet almost anyone's budget and needs.  This product comes with all of the tuning capability of the Black Maxx / Mini Maxx but without the digital gauges and automatic defuel capability.

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MSRP  $419.00

OUR PRICE $299.00